Apo A

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Also known as: Apo A-1
Formal name: Apolipoprotein A-I

At a Glance

Why Get Tested?

To determine whether or not you have adequate levels of Apo A, especially if you have a low level of HDL-cholesterol) and to help determine your risk of developing coronary artery disease (CAD)

When to Get Tested?

When you have a high level of cholesterol or fat in the blood (hyperlipidaemia) and/or a family history of heart attack or other vascular disease; when your doctor is trying to assess your risk of developing heart disease; to monitor the effectiveness of lipid treatment and/or lifestyle changes

Sample Required?

A blood sample drawn from a vein in your arm.

Test Preparation Needed?

No test preparation is needed; however, since this test may be performed at the same time as a complete lipid profile, fasting for at least 12 hours may be required.

The Test Sample

What is being tested?

Apolipoproteins are molecules that carry cholesterol in the bloodstream as tiny particles known as lipoproteins. Apo A is an apolipoprotein that is part of the high-density lipoprotein (HDL) particle. HDL is known as the `good’ lipoprotein because it helps get rid of excess cholesterol in the bloodstream. Excess cholesterol can deposit in the arteries, causing hardening of the arteries (atherosclerosis) and, eventually, heart attacks and other vascular diseases.

If your level of Apo A is low this suggests you have a low level of `good’ HDL particles in your bloodstream. This may mean that you have a higher than normal risk of having a heart attack (coronary artery disease (CAD) or other vascular diseases.

How is the sample collected for testing?

Typically, a blood sample is obtained by inserting a needle into a vein in your arm.

Is any test preparation needed to ensure the quality of the sample?

No test preparation is needed; however, since this test may be performed at the same time as a complete lipid profile, fasting for at least 12 hours may be required.

The Test

Common Questions

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